... WLAN optional (support WiFi ,802.11b/g), 1*SIM slot ,PPPoE/ADSL,NAT ,VOIP Ethernet Interface:1-2 * ... TFTP upgradeDisplay:LCD display,display 16 Telephone Number, Clock, back lightCase:12 Dialing Keyback light,12 function ... call;HIP1860(3) support telephone tone auto answer, alarm Clock and so on function;Support call waiting, call transferring, ... HIP1860(3) IP Phone SIP PHONE connect with Voip gateway